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CEH Foundation

Ethical hacking

What is an OS? Operating System
There are two categories of software. Name them. System software and Application software
What Is a Kernel ? The kernel is the core of the operating system.
Ring architecture of the operating system.
What Is a File System ? A file system is how data will be stored or retrieved from the storage devices in the OS.
What are the three main groups of file systems in use today?
What are Device Drivers ? Device drivers are a special type of software program used for interfacing between the hardware device and the operating system. (audio/video, storage, etc.)
When an application is executed, the operating system has to allocate a memory region to store the application’s temporary data. What are two common ways of allocating memory to an application? The two common ways of allocating memory to an application are stack-based and heap-based memory allocation.
How does a Stack-Based Memory Allocation work? The stack works in a last-in/ first-out (LIFO) manner. The stack is a limited memory area that grows or shrinks as the function pushes or pops the variables.The stack memory is allocated and freed automatically.
How does a Heap-Based Memory Allocation work? Heap memory is allocated using functions. The heap is a memory region that is not managed automatically (unlike the stack).
Created by: ssuser57